CN111629385A

CN111629385A - Full-duplex reference signal configuration method, terminal and base station

Info

Publication number: CN111629385A
Application number: CN201910152630.3A
Authority: CN
Inventors: 张公正; 孔垂丽
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-09-04
Anticipated expiration: 2039-02-28
Also published as: EP3913957A1; CN111629385B; WO2020173286A1; EP3913957A4

Abstract

The embodiment of the application provides a configuration method of full-duplex reference signals, a terminal and a base station, which relate to the field of communication, and the method comprises the following steps: the terminal receives the configuration information and configures the uplink reference signal based on the configuration information; the configuration information is sent to the terminal after the base station determines the structure of an uplink reference signal and the structure of a downlink reference signal of the terminal based on a preset rule; and the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with the downlink data transmitted by the base station. The method and the device realize dynamic adjustment of the structure of the uplink reference signal to avoid interference influence of downlink data on the uplink reference signal, thereby improving the accuracy of the terminal on interference channel estimation.

Description

Full-duplex reference signal configuration method, terminal and base station

Technical Field

The embodiment of the application relates to the field of communication, in particular to a configuration method of a full-duplex reference signal, a terminal and a base station.

Background

Currently, in a full-duplex or hybrid-duplex system, self-interference and mutual interference exist at a terminal side, and therefore, the terminal needs to estimate an interference channel and perform interference cancellation based on an estimation result to improve signal quality. However, since the interference signal (referred to as an uplink signal) at the terminal side is asynchronous with the useful signal (referred to as a downlink signal), the uplink reference signal and the downlink data overlap, that is, the downlink data interferes with the uplink reference signal, so that the estimation result of the interference channel is affected, and the interference suppression effect is further reduced.

Disclosure of Invention

The application provides a configuration method of a full duplex reference signal, a terminal and a base station, which can avoid the interference influence of downlink data on an uplink reference signal to a certain extent.

In order to achieve the purpose, the technical scheme is as follows:

in a first aspect, an embodiment of the present application provides a method for configuring a full-duplex reference signal, where the method is applied to a terminal, and the method includes: the terminal receives the configuration information and configures the uplink reference signal based on the received configuration information; the configuration information is sent to the terminal after the base station determines the structure of an uplink reference signal and the structure of a downlink reference signal of the terminal based on a preset rule; and the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with the downlink data transmitted by the base station.

By the method, the structure of the uplink reference signal is dynamically adjusted, so that the interference influence of downlink data on the uplink reference signal is avoided, and the accuracy of the terminal in estimating the interference channel is improved.

In one possible implementation, the preset rule may include: the structure of the uplink reference signals comprises k uplink reference signals, wherein k is an integer greater than 1; and/or the structure of the downlink reference signals comprises q downlink reference signals, wherein q is an integer greater than 1. For example, the following steps are carried out: the structure of the uplink reference signal may include 2 uplink reference signals, and the structure of the downlink reference signal may include 3 downlink reference signals, so that the length of the structure of the reference signals is adjusted by increasing the number of the reference signals, thereby avoiding the overlap of the downlink data and the uplink reference signals.

In one possible implementation, the preset rule may include: determining a k value according to configuration parameters of a base station; the configuration parameter is used to indicate the cell radius of the base station. For example, the following steps are carried out: the preset rule is configured in the base station in advance, and the base station may determine the k value corresponding to the terminal according to the provision of the preset rule, that is, according to the correspondence between the cell radius of the base station and the k value. Therefore, the terminal accessed into the cell can be configured with the same structure of the uplink reference signal and the same structure of the downlink reference signal, so that the uplink reference signal of the terminal positioned at the edge of the cell is not influenced by the interference of downlink data any more, and the accuracy of the interference channel estimation of the terminal at the edge of the cell is improved.

In one possible implementation, the preset rule may include: and determining the k value according to the distance parameter between the terminal and the base station. For example, the following steps are carried out: the preset rule is configured in the base station in advance, and the base station may determine the k value corresponding to the terminal based on the correspondence between the distance parameter and the k value after acquiring the distance parameter between the base station and the terminal. Therefore, terminals which are accessed to the cell and located at different positions can be configured with different uplink reference signal structures and downlink reference signal structures, so that the resource utilization rate is improved under the condition that the uplink reference signals corresponding to the terminals in the cell are not influenced by the interference of downlink data.

In one possible implementation, the preset rule may include: determining a q value according to configuration parameters of a base station; the configuration parameter is used to indicate the cell radius of the base station. Therefore, the terminal accessed into the cell can be configured with the same structure of the uplink reference signal and the same structure of the downlink reference signal, so that the uplink reference signal of the terminal positioned at the edge of the cell is not influenced by the interference of downlink data any more, and the accuracy of the interference channel estimation of the terminal at the edge of the cell is improved.

In one possible implementation, the preset rule may include: and determining a q value according to the distance parameter between the terminal and the base station. Therefore, terminals which are accessed to the cell and located at different positions can be configured with different uplink reference signal structures and downlink reference signal structures, so that the resource utilization rate is improved under the condition that the uplink reference signals corresponding to the terminals in the cell are not influenced by the interference of downlink data.

In one possible implementation, the k uplink reference signals are continuous in the structure of the uplink signals; and q downlink reference signals are continuous in the structure of the downlink signals.

Through the above manner, the structure of the uplink reference signal including at least one uplink reference signal that is not overlapped with the downlink data is realized, for example: the structure of the uplink reference signal may include three uplink reference signals that do not overlap with the downlink data, so as to further improve the accuracy of the interference channel estimation.

In one possible implementation, at least one uplink reference signal is orthogonal to a downlink reference signal in the structure of downlink reference signals. For example, the following steps are carried out: the orthogonal uplink reference signal and the orthogonal downlink reference signal may be ZC sequences or PN sequences (also referred to as m sequences).

By the method, the interference channel (uplink signal) and the useful channel (downlink signal) are estimated simultaneously.

In one possible implementation, the k value and the q value satisfy the following condition:

r≤T_cp+(A-2)*T_datac/2, wherein k + q ═ a;

where r represents the distance between the terminal and the base station or the cell radius of the base station, T_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataDenotes the length of a symbol occupied by the uplink reference signal or the downlink reference signal, and c denotes the speed of light.

Through the mode, the specific numerical values of the k value and the q value are determined according to the distance between the terminal and the base station or the corresponding relation between the cell radius of the base station and the k value and the q value.

In a possible implementation manner, the preset rule may further include: the structure of the uplink signal comprises an uplink reference signal and m blank symbols, and the structure of the downlink signal comprises a downlink reference signal and n blank symbols; wherein m is an integer greater than or equal to 1, and n is an integer greater than m. In one possible implementation, m blank symbols may be located before the uplink reference signal and n blank symbols may be located after the downlink reference signal. Alternatively, in another possible implementation, m blank symbols may be located after the uplink reference signal and n blank symbols may be located before the downlink reference signal.

By the method, the lengths of the structure of the uplink reference signal and the structure of the downlink reference signal are adjusted by adding the blank symbol, and the position of the uplink reference signal in the structure of the uplink reference signal and the position of the downlink reference signal behind the downlink reference signal are adjusted, so that the interference influence of downlink data on the uplink reference signal is avoided, and the accuracy of interference channel estimation is effectively improved.

In a possible implementation manner, the preset rule may further include: determining an m value and an n value according to configuration parameters of a base station; the configuration parameter is used to indicate the cell radius of the base station.

In a possible implementation manner, the preset rule may further include: and determining the m value and the n value according to the distance parameter between the terminal and the base station.

In a possible implementation manner, the preset rule may further include: m blank symbols are continuous in the structure of the uplink reference signal; and n blank symbols are consecutive in the structure of the downlink reference signal. In another possible implementation manner, there may also be partial discontinuity in the m blank symbols, for example, the structure of the uplink reference signal includes 3 blank symbols, where 2 blank symbols may be located before the uplink reference signal, and 1 blank symbol is located after the uplink reference signal.

In one possible implementation, the value of n satisfies the following condition:

n≥2*r/(c*(T_cp+T_data))

In a second aspect, an embodiment of the present application provides a method for configuring a full duplex reference signal, where the method is applied to a base station, and the method may include: the base station determines the structure of an uplink reference signal of the terminal based on a preset rule; the base station configures the structure of the downlink reference signal based on a preset rule; then, the base station sends configuration information to the terminal, wherein the configuration information is used for indicating the terminal to configure the uplink reference signal based on the structure of the uplink reference signal; the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with downlink data transmitted by the base station.

In one possible implementation, the preset rule may include: the structure of the uplink reference signals comprises k uplink reference signals, wherein k is an integer greater than 1; and/or the structure of the downlink reference signals comprises q downlink reference signals, wherein q is an integer greater than 1.

In one possible implementation, the preset rule includes: determining a k value according to configuration parameters of a base station; the configuration parameter is used to indicate the cell radius of the base station.

In one possible implementation, the preset rule includes: and determining the k value according to the distance parameter between the terminal and the base station.

In one possible implementation, the preset rule includes: determining a q value according to configuration parameters of a base station; the configuration parameter is used to indicate the cell radius of the base station.

In one possible implementation, the preset rule includes: and determining a q value according to the distance parameter between the terminal and the base station.

In one possible implementation, at least one uplink reference signal is orthogonal to a downlink reference signal in the structure of the downlink reference signal.

r≤T_cp+(A-2)*T_datac/2, wherein, k +q＝A；

In one possible implementation, the preset rule includes: the structure of the uplink signal comprises an uplink reference signal and m blank symbols, and the structure of the downlink signal comprises a downlink reference signal and n blank symbols; wherein m is an integer greater than or equal to 1, and n is an integer greater than m.

In one possible implementation, the preset rule includes: determining an m value and an n value according to configuration parameters of a base station; the configuration parameter is used to indicate the cell radius of the base station.

In one possible implementation, the preset rule includes: and determining the m value and the n value according to the distance parameter between the terminal and the base station.

In one possible implementation, the m blank symbols are consecutive in the structure of the uplink reference signal; and n blank symbols are consecutive in the structure of the downlink reference signal.

n≥2*r/(c*(T_cp+T_data))

In a third aspect, an embodiment of the present application provides a terminal, including: the device comprises a receiving module and a configuration module. The receiving module may be configured to receive configuration information, and the configuration module may be configured to configure an uplink reference signal based on the received configuration information; the configuration information is sent to the terminal after the base station determines the structure of an uplink reference signal and the structure of a downlink reference signal of the terminal based on a preset rule; and the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with the downlink data transmitted by the base station.

In one possible implementation, the preset rule includes: the structure of the uplink reference signals comprises k uplink reference signals, wherein k is an integer greater than 1; and/or the structure of the downlink reference signals comprises q downlink reference signals, wherein q is an integer greater than 1.

r≤T_cp+(A-2)*T_datac/2, wherein k + q ═ a;

where r represents the distance between the terminal and the base station or the cell radius of the base station, T_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataIndicating the length of the symbol occupied by the uplink reference signal or the downlink reference signalAnd c represents the speed of light.

n≥2*r/(c*(T_cp+T_data))

In a fourth aspect, an embodiment of the present application provides a base station, including: the device comprises a determining module, a configuring module and a sending module. The determining module is used for determining the structure of the uplink reference signal of the terminal based on a preset rule; the configuration module is used for configuring the structure of the downlink reference signal based on a preset rule; the sending module is used for sending configuration information to the terminal, and the configuration information is used for indicating the terminal to configure the uplink reference signal based on the structure of the uplink reference signal; the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with downlink data transmitted by the base station.

r≤T_cp+(A-2)*T_datac/2, wherein k + q ═ a;

n≥2*r/(c*(T_cp+T_data))

In a fifth aspect, an embodiment of the present application provides a terminal, including: a transceiver/transceiver pin and a processor, optionally also including a memory. Wherein the transceiver/transceiver pins, the processor and the memory communicate with each other through internal connection paths; the processor is used for executing instructions to control the transceiver/transceiver pin to transmit or receive signals; the memory is to store instructions. When the processor executes the instructions, the processor performs the method of the second aspect or any possible implementation manner of the second aspect.

In a sixth aspect, an embodiment of the present application provides a base station, including: a transceiver/transceiver pin and a processor, optionally also including a memory. Wherein the transceiver/transceiver pins, the processor and the memory communicate with each other through internal connection paths; the processor is used for executing instructions to control the transceiver/transceiver pin to transmit or receive signals; the memory is to store instructions. When the processor executes the instructions, the processor performs the method of the first aspect or any possible implementation manner of the first aspect.

In a seventh aspect, this application embodiment provides a computer-readable medium for storing a computer program including instructions for executing the method of the first aspect or any possible implementation manner of the first aspect.

In an eighth aspect, embodiments of the present application provide a computer-readable medium for storing a computer program comprising instructions for executing the second aspect or the method in any possible implementation manner of the second aspect.

In a ninth aspect, the present application provides a computer program including instructions for executing the method of the first aspect or any possible implementation manner of the first aspect.

In a tenth aspect, the present application provides a computer program including instructions for executing the method of the second aspect or any possible implementation manner of the second aspect.

In an eleventh aspect, embodiments of the present application provide a chip, where the chip includes a processing circuit and a transceiver pin. Wherein the transceiver pin and the processing circuit are in communication with each other via an internal connection path, and the processing circuit is configured to perform the method of the first aspect or any one of the possible implementations of the first aspect to control the receiving pin to receive signals and to control the sending pin to send signals.

In a twelfth aspect, an embodiment of the present application provides a chip, where the chip includes a processing circuit and a transceiver pin. Wherein the transceiver pin and the processing circuit are in communication with each other via an internal connection path, and the processing circuit performs the method of the second aspect or any possible implementation manner of the second aspect to control the receiving pin to receive signals and to control the sending pin to send signals.

In a thirteenth aspect, an embodiment of the present application provides a system, where the system includes the base station and the terminal related to the first aspect and the second aspect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive exercise.

Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present application;

fig. 2a is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 2b is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 3 is a schematic diagram of a full duplex mode according to an embodiment of the present application;

FIG. 4 is an exemplary illustration of one manner of communication;

FIG. 5 is one of exemplary provided communication manners;

FIG. 6 is a schematic diagram of an exemplary provided signal delay;

FIG. 7 is one of exemplary provided diagrams of an interference scenario;

FIG. 8 is one of exemplary provided schematic diagrams of an interference scenario;

FIG. 9 is one of schematic diagrams of an exemplary provided reference signal;

FIG. 10 is one of schematic diagrams of an exemplary provided reference signal;

fig. 11 is a flowchart illustrating a method for configuring a full-duplex reference signal according to an embodiment of the present disclosure;

fig. 12 is a flowchart illustrating a method for configuring full duplex reference signals according to an embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 14 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 15 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 17 is a flowchart illustrating a method for configuring full duplex reference signals according to an embodiment of the present application;

fig. 18a is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 18b is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 21 is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 22a is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 22b is a schematic structural diagram of a reference signal according to an embodiment of the present application;

fig. 23 is a flowchart illustrating a method for configuring full duplex reference signals according to an embodiment of the present disclosure;

fig. 24 is a flowchart illustrating a method for configuring full duplex reference signals according to an embodiment of the present disclosure;

fig. 25 is a schematic structural diagram of a terminal according to an embodiment of the present application;

fig. 26 is a schematic structural diagram of a base station according to an embodiment of the present application;

fig. 27 is a schematic structural diagram of an apparatus according to an embodiment of the present disclosure.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.

The terms "first" and "second," and the like, in the description and in the claims of the embodiments of the present application are used for distinguishing between different objects and not for describing a particular order of the objects. For example, the first target object and the second target object, etc. are specific sequences for distinguishing different target objects, rather than describing target objects.

In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.

In the description of the embodiments of the present application, the meaning of "a plurality" means two or more unless otherwise specified. For example, a plurality of processing units refers to two or more processing units; the plurality of systems refers to two or more systems.

Before describing the technical solutions of the embodiments of the present application, a communication system according to the embodiments of the present application will be described with reference to the drawings. Referring to fig. 1, a communication system according to an embodiment of the present application is schematically illustrated. The communication system includes a base station, a terminal 1, and a terminal 2. In the specific implementation process of the embodiment of the application, the terminal can be a computer, a smart phone, a telephone, a cable television set-top box, a digital subscriber line router and other devices. It should be noted that, in practical applications, the number of the base stations and the number of the terminals may be one or more, and the number of the base stations and the number of the terminals in the communication system shown in fig. 1 are only adaptive examples, which is not limited in this application.

The communication system may be configured to support a fourth generation (4G) access technology, such as a Long Term Evolution (LTE) access technology; alternatively, the communication system may also support fifth generation (5G) access technologies, such as New Radio (NR) access technologies; alternatively, the communication system may also be used to support third generation (3G) access technologies, such as Universal Mobile Telecommunications System (UMTS) access technologies; or the communication system may also be used to support second generation (2G) access technologies, such as global system for mobile communications (GSM) access technologies; alternatively, the communication system may also be used for a communication system supporting a plurality of wireless technologies, for example, supporting the LTE technology and the NR technology. In addition, the communication system may also be applied to narrowband Band-Internet of Things (NB-IoT), enhanced data rate for GSM Evolution (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA 2000), Time Division-synchronous Code Division Multiple Access (TD-SCDMA), Long Term Evolution (Long Term Evolution, LTE), and future-oriented communication technologies.

And, the base station in fig. 1 may be used to support terminal access, for example, a Base Transceiver Station (BTS) and a Base Station Controller (BSC) in a 2G access technology communication system, a node b (node b) and a Radio Network Controller (RNC) in a 3G access technology communication system, an evolved node b (eNB) in a 4G access technology communication system, a next generation base station (next generation node b) in a 5G access technology communication system, a Transmission Reception Point (TRP), a relay node (relay node), an Access Point (AP), and the like. For convenience of description, in all embodiments of the present application, apparatuses providing a terminal with a wireless communication function are collectively referred to as a network device or a base station.

The terminal in fig. 1 may be a device that provides voice or data connectivity to a user, and may also be referred to as a mobile station (mobile station), a subscriber unit (subscriber unit), a station (station), a Terminal Equipment (TE), etc. The terminal may be a cellular phone (cellular phone), a Personal Digital Assistant (PDA), a wireless modem (modem), a handheld device (hand-held), a laptop computer (laptop computer), a cordless phone (cordless phone), a Wireless Local Loop (WLL) station, a tablet (pad), or the like. With the development of wireless communication technology, all devices that can access a communication system, can communicate with a network side of the communication system, or communicate with other objects through the communication system may be terminals in the embodiments of the present application, such as terminals and automobiles in intelligent transportation, home devices in smart homes, power meter reading instruments in smart grid, voltage monitoring instruments, environment monitoring instruments, video monitoring instruments in smart security networks, cash registers, and so on. In the embodiment of the present application, the terminal may communicate with a base station, for example, the base station in fig. 1. Communication may also be performed between multiple terminals. The terminals may be stationary or mobile.

Fig. 2a is a schematic structural diagram of a base station. In fig. 2 a:

the base station comprises at least one processor 101, at least one memory 102, at least one transceiver 103, at least one network interface 104 and one or more antennas 105. The processor 101, memory 102, transceiver 103 and network interface 104 are connected, for example, by a bus. The antenna 105 is connected to the transceiver 103. The network interface 104 is used to connect the base station to other communication devices via a communication link. In the embodiment of the present application, the connection may include various interfaces, transmission lines, buses, and the like, which is not limited in this embodiment.

The processor in the embodiment of the present application, for example, the processor 101, may include at least one of the following types: a general-purpose Central Processing Unit (CPU), a Digital Signal Processor (DSP), a microprocessor, an Application-specific integrated Circuit (ASIC), a Microcontroller (MCU), a Field Programmable Gate Array (FPGA), or an integrated Circuit for implementing logical operations. For example, the processor 101 may be a single-core (single-CPU) processor or a multi-core (multi-CPU) processor. The at least one processor 101 may be integrated in one chip or located on a plurality of different chips.

The memory in the embodiments of the present application, for example, the memory 102, may include at least one of the following types: read-only memory (ROM) or other types of static memory devices that may store static information and instructions, Random Access Memory (RAM) or other types of dynamic memory devices that may store information and instructions, and Electrically erasable programmable read-only memory (EEPROM). In some scenarios, the memory may also be, but is not limited to, a compact disk-read-only memory (CD-ROM) or other optical disk storage, optical disk storage (including compact disk, laser disk, optical disk, digital versatile disk, blu-ray disk, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.

The memory 102 may be separate and coupled to the processor 101. Alternatively, the memory 102 may be integrated with the processor 101, for example, in one chip. The memory 102 can store program codes for executing the technical solutions of the embodiments of the present application, and is controlled by the processor 101 to execute, and various executed computer program codes can also be regarded as drivers of the processor 101. For example, the processor 101 is configured to execute the computer program code stored in the memory 102, so as to implement the technical solution in the embodiment of the present application. Optionally, the memory 102 may be off-chip and interface with the processor 101.

The transceiver 103 may be used to support the reception or transmission of radio frequency signals between the access network equipment and the terminal, and the transceiver 103 may be connected to the antenna 105. The transceiver 103 includes a transmitter Tx and a receiver Rx. In particular, one or more antennas 105 may receive a radio frequency signal, and the receiver Rx of the transceiver 103 is configured to receive the radio frequency signal from the antenna, convert the radio frequency signal into a digital baseband signal or a digital intermediate frequency signal, and provide the digital baseband signal or the digital intermediate frequency signal to the processor 101, so that the processor 101 performs further processing on the digital baseband signal or the digital intermediate frequency signal, such as demodulation processing and decoding processing. In addition, the transmitter Tx in the transceiver 103 is also used to receive a modulated digital baseband signal or a digital intermediate frequency signal from the processor 101, convert the modulated digital baseband signal or the digital intermediate frequency signal into a radio frequency signal, and transmit the radio frequency signal through the one or more antennas 105. Specifically, the receiver Rx may selectively perform one or more stages of down-mixing and analog-to-digital conversion processes on the rf signal to obtain a digital baseband signal or a digital intermediate frequency signal, wherein the order of the down-mixing and analog-to-digital conversion processes is adjustable. The transmitter Tx may selectively perform one or more stages of up-mixing and digital-to-analog conversion processes on the modulated digital baseband signal or the modulated digital intermediate frequency signal to obtain the rf signal, where the order of the up-mixing and the digital-to-analog conversion processes is adjustable. The digital baseband signal and the digital intermediate frequency signal may be collectively referred to as a digital signal.

Fig. 2b is a schematic diagram of a terminal structure. In fig. 2 b:

the terminal comprises at least one processor 201, at least one transceiver 202 and at least one memory 203. The processor 201, the memory 203 and the transceiver 202 are connected. Optionally, the terminal may also include an output device 204, an input device 205, and one or more antennas 206. The antenna 206 is connected to the transceiver 202 and the output device 204 and the input device 205 are connected to the processor 201.

The transceiver 202, memory 203 and antenna 206 may perform similar functions as described in relation to fig. 2 a.

The processor 201 may be a baseband processor or a CPU, and the baseband processor and the CPU may be integrated together or separated.

The processor 201 may be used to implement various functions for the terminal, such as processing communication protocols and communication data, or controlling the whole terminal device, executing software programs, and processing data of the software programs; or to assist in completing computational processing tasks, such as processing of graphical images or audio, etc.; or the processor 201 may be configured to perform one or more of the above-described functions

The output device 204 is in communication with the processor 201 and may display information in a variety of ways. For example, the output device 204 may be a Liquid Crystal Display (LCD), a Light Emitting Diode (LED) Display device, a Cathode Ray Tube (CRT) Display device, a projector (projector), or the like. The input device 205 is in communication with the processor 201 and can accept user input in a variety of ways. For example, the input device 205 may be a mouse, a keyboard, a touch screen device, or a sensing device, among others.

The memory 202 may be separate and coupled to the processor 201. Optionally, the memory 202 may also be integrated with the processor 201, for example, within one chip. The memory 202 can store program codes for executing the technical solutions of the embodiments of the present application, and is controlled by the processor 201 to execute, and various executed computer program codes can also be regarded as drivers of the processor 201. For example, the processor 201 is configured to execute the computer program code stored in the memory 202, so as to implement the technical solution in the embodiment of the present application. Optionally, the memory 202 may be off-chip and interface with the processor 201.

For better understanding of the technical solutions of the present application, the following is a brief description of the prior art related to the present application.

Currently, according to different Division modes of uplink and downlink on Time-Frequency resources, a half-duplex mode can be divided into Time Division Duplex (TDD) and Frequency Division Duplex (FDD). TDD refers to that uplink and downlink are distinguished by using different time slots, for example, in an LTE system, a frame is divided into an uplink subframe and a downlink subframe for uplink and downlink transmission, respectively. In general, to avoid interference between uplink and downlink, TDD needs to add a guard subframe when a downlink subframe is converted into an uplink subframe (the uplink subframe may not be added to the downlink subframe because the base station can control the conversion time), and maintain relative synchronization of the whole network. Frequency division duplex refers to that uplink and downlink links are distinguished by using different frequency spectrums, and generally, in order to avoid interference between the uplink and downlink, a guard band is left between the uplink frequency spectrum and the downlink frequency spectrum of a frequency division duplex system.

The full-duplex technology realizes the simultaneous transmission of uplink and downlink on the same time-frequency resource, and the frequency spectrum efficiency is twice of that of half-duplex. In a full-duplex system, devices simultaneously transmit and receive at the same frequency, and a receiving antenna receives a transmission signal from the device, namely self-interference. Since the transmitting and receiving antennas of the same device are close to each other or even the same antenna, the self-interference signal strength is much higher than the useful signal, which may cause the devices in the receiver to be saturated, resulting in the loss of the useful signal. Therefore, the receiver must remove self-interference before demodulating the desired signal. The key to self-interference cancellation is to estimate the channel from which the signal was sent to the receive antenna, accurately reconstruct the self-interference signal, and subtract it from the received signal (i.e., cancel the interference signal in the received signal). As shown in fig. 3, which is a schematic diagram of a full duplex mode, in fig. 3, a transmitting end transmits a transmitting signal to a receiving end through a transmitting antenna, and at the same time, the transmitting end can receive a useful signal through a receiving antenna (the useful signal may be from other devices or the receiving end in the figure, which are not shown), and then, for the transmitting end of the full duplex mode, the transmitting signal will cause self-interference to the useful signal.

The full duplex technology is applied to a wireless communication system, and mainly comprises the following two modes:

1) fig. 4 shows a communication mode applied to the communication system shown in fig. 1, wherein the base station operates in a full-duplex mode and the terminal operates in a half-duplex mode.

2) Fig. 5 shows another communication method applied to the communication system shown in fig. 1, in which both the base station and the terminal operate in a full duplex mode.

Specifically, in the communication scheme shown in fig. 4, the base station receives a self-interference signal from a base station transmitter; on the other hand, the downlink user (terminal 1 in fig. 4) receives not only the useful signal (i.e., downlink signal) from the base station, but also a signal (i.e., uplink signal transmitted by terminal 2) from the uplink user (terminal 2 in fig. 4), i.e., a mutual interference signal.

In the communication scheme shown in fig. 5, both the base station and the terminal are in full duplex mode, and therefore both the base station and the terminal are affected by self-interference.

In addition, in combination with the communication methods shown in fig. 4 and 5, there may be a hybrid duplex communication system, for example: terminals 1 and 2 in fig. 4 may be terminals in full duplex mode, or terminal 1 may be a terminal in full duplex mode and terminal 2 may be a terminal in half duplex mode. It should be noted that, when the terminal 1 and the terminal 2 are in the full duplex mode or at least one of the terminals is in the full duplex mode, due to function limitation, the base station can receive an uplink signal sent by only one terminal on the same timeslot resource and send a downlink signal to one terminal (which may be different terminals, as shown in fig. 4, or terminals corresponding to the uplink signal, as shown in fig. 5), so that, no matter what state the terminal operates in (referring to full duplex or half duplex), when there are multiple terminals, there is only self-interference or mutual interference on the terminal side, and there is no self-interference and mutual interference coexisting scenario.

To achieve full-duplex gain, the system needs to process both types of interference (including self-interference and mutual interference) through interference cancellation or interference suppression techniques, which both need to accurately estimate the channel experienced by the interfering signal.

In the prior art, synchronization is a basic requirement of cellular mobile communication systems, especially in LTE and 5GNR systems based on Orthogonal Frequency Division Multiplexing (OFDM): the lack of synchronism causes seriousInter-symbol and inter-carrier interference. In a conventional cellular mobile communication system, downlink signals of terminals in a cell are all sent by a base station during downlink transmission, and therefore, the downlink signals can be synchronized. In the uplink transmission process, the base station receives uplink signals sent by different terminals, and since the distances between the terminals and the base station may be different, and based on the difference of the propagation times of the signals, the arrival times of the uplink signals at the base station may be different. In order to achieve uplink synchronization (i.e. the uplink signals in the same timeslot arrive at the base station at the same time), the cellular communication system employs a timing advance mechanism, i.e. different terminals transmit in advance by a certain amount of time according to the distance between the terminals and the base station, so as to ensure that the arrival time of each terminal at the base station is consistent, as shown in fig. 6, the uplink signal 1 of terminal 1 is advanced by TA₁In transmission, terminal 2 is farther away from the base station than terminal 1 is, and therefore, uplink signal 2 of terminal 2 is advanced by TA₂Transmission, TA₂Greater than TA₁If so, the time of the uplink signal 1 and the time of the uplink signal 2 reaching the base station are the same, and uplink transmission synchronization is realized. Fig. 6 also shows the transmission delay of the downlink signal, and in fig. 6, the base station transmits the downlink signal, wherein the downlink signal 1 transmitted to the terminal 1 is delayed by TP₁Arrives at terminal 1 (i.e. the difference TP between the transmission time and the terminal reception₁) Downlink signal 2 sent to terminal 2 is delayed by TP₂To the terminal 2.

In addition, in order to combat the multipath effect caused by the complex wireless propagation environment, the orthogonality of OFDM is ensured by a Cyclic Prefix (CP) added before the OFDM symbol, and the length of the CP (which refers to the length of the symbol occupied by the CP) is generally related to the maximum transmission delay of multipath.

When full duplex is applied to the existing cellular mobile communication system, especially to macro cells, the self-interference/mutual interference and the useful signal are not synchronized any more due to the simultaneous uplink and downlink transmission in the cell.

Specifically, in the case of interference in the communication scheme shown in fig. 4, as shown in fig. 7, the uplink signal 1 transmitted by the terminal 1 passes through the TP₁Then arrives at the base station to ensure synchronization of the uplink transmission, i.e. the uplink signal 1 sent by the terminal 1 arrivesThe base station timing is aligned with the base station timing. And the downlink signal 1 transmitted by the base station passes through TP₂And then to terminal 2. At this time, the self-interference signal received by the base station, i.e. the transmission signal of the base station, is synchronized with the useful signal. And, as mentioned above, in this scenario there may also be mutual interference, i.e. the uplink signal 1 passes through the TP₃To the terminal 2. But due to the uplink propagation delay (i.e., TP)₃) And downstream propagation delay (i.e., TP)₂) It may be different that the mutual interference signal (i.e. uplink signal 1) from the terminal 1 received by the terminal 2 is different from the useful signal (i.e. downlink signal 1) from the base station by Δ t. The delay difference is related to the geographical position of the base station and the terminal:

Δt＝TP₁+TP₂–TP₃＝(d₁+d₂-d₃)/c

wherein d is₁Is the distance between the base station and the terminal 1, d₂Is the distance between the base station and terminal 2, d₃Distance between terminal 1 and terminal 2, and c is the speed of light, c 3 x 10⁸m/s. From the relationship of the triangles, it can be determined that Δ t ≧ 0, where if Δ t>0, then the mutual interference is asynchronous with the useful signal.

Specifically, in the interference situation in the communication method shown in fig. 5, as shown in fig. 8, the terminal sends the uplink signal to the base station in advance of TA to ensure synchronization of uplink transmission, and the uplink signal arrives at the base station and is aligned with the base station timing. At this time, the self-interference signal received by the base station, that is, the downlink signal sent by the base station and the useful signal are still synchronous; however, due to the downlink propagation delay (i.e. TP) from the base station to the terminal and the advanced transmission (i.e. TA) from the terminal, the self-interference signal received by the terminal is different from the desired signal by the TA, i.e. the self-interference is asynchronous with the desired signal.

These asynchronous characteristics of the received signal in a full-duplex system can affect channel estimation and subsequent interference cancellation/suppression, posing challenges to conventional reference signal design.

In order to estimate the channels of the self-interference signal and the useful signal at the same time, the prior art scheme allocates orthogonal reference signals (time-frequency domain, code domain) to uplink and downlink transmissions. As shown in fig. 9, the scheme is an extension of a reference signal in a Multiple-Input Multiple-Output (MIMO) technology in the existing LTE or 5G NR, where the reference signal may be placed across in a frequency domain according to uplink and downlink, or an orthogonal reference sequence, such as a ZC (Zadoff-Chu) or Pseudo-random Code (PN) sequence, may be adopted according to the uplink and downlink.

The existing technical scheme is designed according to the premise that the uplink and the downlink are orthogonal, namely the interference signal is synchronous with the useful signal, and the designed orthogonality can be met only under the synchronous condition. As can be seen from the above analysis of the full duplex system, for the terminal side, the interference signals (including self-interference signals or mutual interference signals) may be asynchronous with the useful signals, as shown in fig. 10. At this time, the downlink data may generate interference (within a dashed line frame in the figure) on the uplink reference signal of the terminal, thereby affecting channel estimation of the terminal self-interference signal. The orthogonality of such uplink and downlink reference signals is destroyed, and accurate signal estimation cannot be performed, and thus effective interference cancellation or suppression and data demodulation cannot be performed. It should be noted that, for the terminal 1 in fig. 1, the uplink signal in fig. 10 may be an uplink signal sent by the terminal 1 to the base station, and the downlink signal is a signal sent by the base station to the terminal 1, that is, the uplink signal in fig. 10 is a self-interference signal for the downlink signal (useful signal). Alternatively, the uplink signal in fig. 10 may also be an uplink signal that is transmitted by the terminal 2 to the base station and affects the terminal 1 at the same time, and the downlink signal is a signal that is transmitted by the base station to the terminal 1, that is, the uplink signal is a mutual interference signal with respect to the downlink signal (useful signal). And, the time delay difference Δ t between the uplink reference signal in the time slot n and the downlink reference signal in the time slot n shown in fig. 10 is only an illustrative example, as described above, since the distance between the terminal and the base station or the terminal and the terminal causes the uplink reference signal and the downlink reference signal on the side of the terminal to be asynchronous, in practice, the magnitude of Δ t depends on the distance between the terminal and the base station, that is, the larger the distance between the terminal and the base station or the distance between the terminals is, the larger Δ t is, that is, the largest Δ t between the uplink reference signal (including the uplink reference signal sent by the terminal or the uplink reference signal received from other terminals) of the terminal located at the edge of the cell and the downlink reference signal is.

Therefore, how to improve the accuracy of estimating the interference channel at the terminal side is a problem that needs to be solved urgently.

The embodiment of the application aims to adjust the relative positions of the uplink reference signal, the downlink reference signal and data (including uplink data and downlink data) by optimizing the structure of the reference signal, avoid overlapping, eliminate interference and improve the accuracy of interference channel estimation. It should be noted that the data (including uplink data and downlink data) described in the embodiment of the present application refers to a data portion other than a reference signal portion on a corresponding carrier in the signal shown in fig. 10, and may also be referred to as a data symbol. That is, in the technical solution in this embodiment of the present application, the problem of overlapping between the uplink reference signal and the downlink data in fig. 10 may be solved by configuring the structure of the uplink reference signal and/or the structure of the downlink reference signal.

In conjunction with the schematic diagram of the communication system shown in fig. 1, a specific embodiment of the present application is described below, it should be noted that the base station in fig. 1 is in a full-duplex mode, and the terminals may be in a full-duplex mode entirely, or in a half-duplex mode entirely, or in a hybrid duplex mode (for example, terminal 1 is in a full-duplex mode, and terminal 2 is in a half-duplex mode), where when the terminals communicate with the base station, data transmission is performed according to the communication method shown in fig. 4 or fig. 5.

Scene one

Referring to fig. 1, as shown in fig. 11, a schematic flow chart of a method for configuring a full duplex reference signal in the embodiment of the present application is shown, where in fig. 11:

step 101, a terminal accesses a base station.

Specifically, in the embodiment of the present application, a terminal accesses a base station. Optionally, in this embodiment, the base station may determine, for the terminal, a structure of the corresponding uplink reference signal and a structure of the corresponding downlink reference signal based on a distance or a time delay between the terminal and the base station. In an embodiment, the base station may obtain the distance information between the base station and the terminal by sending a reference signal to the terminal, and the base station may obtain the distance value according to information such as a time delay of the received reference signal. In another embodiment, the manner in which the base station obtains the distance value to the terminal may be that the terminal reports location information of the terminal, and the base station may obtain the distance value according to the received location information. The base station may obtain the distance value between the base station and the terminal through any one of possible implementation manners, which is not limited in this application.

For other specific details of the access of the terminal to the base station, for example, an interaction process or a configuration process when the terminal and the base station access, the technical solutions in the embodiments in the prior art may be referred to, and details are not described herein.

And 102, the base station determines the structure of an uplink reference signal and the structure of a downlink reference signal of the terminal based on a preset rule.

Specifically, in the embodiment of the present application, the base station may adjust the length of the uplink reference signal structure and/or the downlink reference signal structure to avoid overlapping between the uplink reference signal and the downlink data at the terminal side (where, when the data overlaps with the reference signal, the data may interfere with the reference signal), and meanwhile, it is ensured that no overlapping occurs between the downlink reference signal and the uplink data at the base station side. Optionally, in this application, a preset rule may be set at the base station side, and the base station may determine the structure of the uplink reference signal and the structure of the downlink reference signal according to a correspondence between the structure of the uplink reference signal and the structure and parameters (the parameters may be distance parameters or cell radius parameters) of the downlink reference signal recorded in the preset rule. Subsequently, the base station may configure the structure of the downlink reference signal, and instruct the terminal to configure the uplink reference signal according to the determined structure of the uplink reference signal through the configuration information (i.e., step 103).

In one embodiment, the manner of adjusting the length of the uplink reference signal and/or the downlink reference signal specified in the preset rule may be: a plurality of consecutive reference signals are configured in the structure of the reference signals (uplink reference signals and/or downlink reference signals), and the details will be set forth in the following scenarios.

In another embodiment, the manner of adjusting the length of the uplink reference signal and/or the downlink reference signal specified in the preset rule may be: a plurality of continuous blank symbols are configured in the structure of the reference signal (uplink reference signal and/or downlink reference signal), and the details will be explained in detail in the following scenario.

In another embodiment, the method for adjusting the length of the uplink reference signal and/or the downlink reference signal specified in the preset rule may further include: at least one reference signal and at least one blank symbol are configured in the structure of the reference signal (uplink reference signal and/or downlink reference signal), and the specific details will be set forth in the following scenarios.

In the embodiment of the present application, when determining the length of the structure of the reference signal (uplink reference signal and/or downlink reference signal), the base station may determine the number of consecutive reference signals or the number of blank symbols in the structure of the reference signal according to the length of the cell radius of the base station. That is, all terminals under the base station can configure the same reference signal structure, so as to overcome self-interference or mutual interference caused by the asynchronous problem of the uplink reference signal and the downlink reference signal at the terminal side due to the delay difference.

Optionally, in this embodiment of the application, when the base station determines the length of the reference signal structure, the number of consecutive reference signals or the number of blank symbols in the reference signal structure may also be determined according to a distance between the base station and the terminal (that is, a distance value between the base station and the terminal acquired by the base station in step 101). That is, a plurality of terminals accessing the base station may be configured with different reference signal structures, and the specific configuration manner will be described in detail in the following embodiments.

Optionally, in an embodiment of the present application, all base stations in the designated area and the cell to which the base station belongs may be configured with the same preset rule, that is, the preset rule may directly specify the structure of the uplink reference signal and the structure of the downlink reference signal, that is, all terminals accessing to the cell in the designated area may be configured with the same uplink reference signal, and the downlink signal sent by the base station for each terminal has the same structure of the downlink reference signal. In this embodiment, the structure of the reference signal in the preset rule may be determined based on the radius of the largest cell in the designated area.

It should be noted that the uplink reference signal configured by the base station for the terminal in the embodiment of the present application refers to an uplink reference signal sent by the terminal to the base station, or may also be an uplink reference signal sent by another terminal to the base station and causing mutual interference to the terminal. That is to say, for the terminals 1 and 2 in fig. 1, if the communication method of the terminals 1 and 2 is as shown in fig. 4, in this embodiment, the uplink reference signal configured by the terminal based on the instruction of the base station is sent to the base station by the terminal 2, and the terminal 1 also receives the uplink signal from the terminal 2, that is, the base station instructs the terminal 2 to configure the uplink reference signal, so that the uplink reference signal received by the terminal 1 from the terminal 2 does not overlap with the downlink data received by the terminal 1 from the base station. In another embodiment, if the communication method of the terminal 1 or the terminal 2 in fig. 1 is as shown in fig. 5, in this embodiment, the uplink reference signal configured by the terminal based on the indication of the base station is the uplink reference signal sent by the terminal 1 to the base station, that is, the base station indicates the terminal 1 to configure the uplink reference signal, so that the uplink reference signal sent by the terminal 1 is not overlapped with the downlink data received by the terminal 1.

Step 103, the base station sends configuration information to the terminal.

Specifically, in the embodiment of the present application, the base station may instruct the terminal to configure the structure of the uplink reference signal according to the content indicated by the configuration information by sending the configuration information to the terminal.

Optionally, the configuration information may be Radio Resource Control (RRC) information, that is, when the base station performs RRC connection with the terminal, the base station may complete a configuration process of a structure of the downlink reference signal and a structure of the uplink reference signal, and issue the structure of the uplink signal corresponding to the terminal through the RRC information. Alternatively, the configuration information may also be protocol information, such as: medium Access Control (MAC) information, etc., which is not limited in this application.

And 104, the terminal configures the uplink reference signal based on the configuration information.

Specifically, in the embodiment of the present application, the terminal receives configuration information sent by the base station, and configures the uplink reference signal based on an indication of the configuration information.

Then, the base station and the terminal can communicate with the downlink reference signal structure based on the configured uplink reference signal structure, that is, the base station sends a downlink signal containing the configured downlink reference signal structure to the terminal, and the terminal sends an uplink signal containing the configured uplink reference signal structure to the base station, so that the uplink reference signal structure at the terminal side includes at least one uplink reference signal that is not overlapped with the downlink data sent by the base station. In the communication process, because at least one uplink reference signal that is not overlapped with the downlink data sent by the base station exists at the terminal side, that is, there is at least one uplink reference signal that is not interfered by the downlink data, the terminal may estimate the self-interference channel or the mutual interference channel based on the at least one reference signal that is not interfered, and eliminate the self-interference signal or the mutual interference signal after determining the self-interference channel or the mutual interference channel, where the related technical content of interference elimination may refer to the method in the prior art embodiment, and is not described in detail herein. Then, the terminal can estimate the useful channel, and at this time, the useful signal (i.e., the downlink signal) will not be affected by self-interference or mutual interference, thereby improving the accuracy of useful channel estimation.

Scene two

Referring to fig. 1, as shown in fig. 12, a schematic flow chart of a method for configuring a full duplex reference signal in an embodiment of the present application is shown, where in fig. 12:

step 201, the terminal accesses to the base station.

Step 202, the base station determines the structure of the uplink reference signal and the structure of the downlink reference signal according to the configuration parameters of the base station.

Specifically, in the embodiment of the present application, the preset rule may include: the base station determines the number of uplink reference signals in the structure of the uplink reference signals and the number of downlink reference signals in the structure of the downlink reference signals based on the configuration parameters of the base station, wherein if two or more uplink reference signals exist in the structure of the uplink reference signals, a plurality of uplink reference signals are continuous in the structure of the uplink reference signals, and similarly, if two or more downlink reference signals exist in the structure of the downlink reference signals, a plurality of downlink reference signals are continuous in the structure of the downlink reference signals.

Optionally, the configuration parameter of the base station may be a cell radius of the base station, where the cell radius refers to a corresponding cell radius of a cell accessed by the terminal. For example: after the terminal 1 and the terminal 2 in fig. 1 access a cell in a base station, the base station may determine the structure of the corresponding uplink reference signal for the terminal 1 and the terminal 2 based on the size of the cell radius. In this embodiment, since the terminal 1 and the terminal 2 access the same cell, the uplink reference signals of the terminal 1 and the terminal 2 have the same structure.

Specifically, the base station may calculate the number k of uplink reference signals in the structure of uplink reference signals and the number q of downlink reference signals in the structure of downlink reference signals according to the following formulas:

r≤T_cp+(A-2)*T_datac/2, wherein k + q ═ A (1)

Where r denotes the cell radius of the base station, T_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataDenotes the length of the symbol occupied by the uplink reference signal or the downlink reference signal, and c denotes the speed of light (3 x 10)⁸m/s), and k and q are each an integer greater than or equal to 1. Note that in the present application, as described in formula (1), k + q ═ a, where k and q are both integers greater than or equal to 1, and that in the present application, when k is equal to 1, q is inevitably an integer greater than 1, for example: when A equals 3, q equals 2 if k equals 1. Conversely, when q is equal to 1, k is necessarily an integer greater than 1.

Referring to the above formula (1), if the sum of k and q is a, and a is 3, k may be 1 and q may be 2, or q may be 1 and k may be 2.

Specifically, a frame structure with a subcarrier spacing of 30kHz and a Fast Fourier Transform (FFT) size of 2048 is taken as an example for detailed description: the symbol length occupied by the CP is T_cpApproximately 2.34us (144 samples), and a symbol length T occupied by an uplink reference signal or a downlink reference signal (the uplink reference signal or the downlink reference signal in the embodiment of the present application may be understood as a data symbol in the uplink reference signal in the prior art embodiment)_dataAbout 33.33us (2048 samples), total symbol length (i.e., the length of CP and reference signal) T_SymbolAbout 35.68us (rounded results). Assuming a cell radius of 5km, a can be calculated to be equal to or greater than 3 according to equation (1).

Based on the above result, in an embodiment, the base station may arbitrarily select a value in the value interval of a as the value of a, and optionally, the base station may also select the minimum value in the value interval as the value of a. Taking the value interval of a as [3, + ∞) ] as an example, the base station may determine that the value of a is 10, or may determine that the value of a is 3, which is not limited in the present application. In this embodiment, taking the example that the base station determines that the a value is 3, k + q is 3. In this embodiment, if k is 2 and q is 1, the structure of the uplink reference signal determined based on the configuration includes 2 consecutive uplink reference signals, and the structure of the downlink reference signal includes 1 downlink reference signal. That is, the base station may increase the length of the structure of the uplink reference signal by configuring a plurality of consecutive uplink reference signals in the structure of the uplink reference signal, so as to realize that there is at least one uplink reference signal that is orthogonal to the downlink reference signal and does not overlap with the downlink data, and the structure of the reference signal is as shown in fig. 13. It should be noted that, as described above, due to the asynchrony between the uplink reference signal and the downlink reference signal generated by the distance between the terminal and the base station or other terminals, and the asynchrony is shown in fig. 10, that is, the time delay difference between the uplink reference signal and the downlink reference signal is Δ t, in order to realize that at least one uplink reference signal that is not interfered by the downlink data exists in the structure of the configured uplink reference signal, in this embodiment (that is, the structure of the uplink reference signal includes a plurality of continuous uplink reference signals, and the structure of the downlink reference signal includes only 1 downlink reference signal), the position of the repeated uplink reference signal is configured after the original uplink reference signal (that is, the uplink reference signal on the time slot n). And, in the present application, a Guard Period (GP) may be added at the end of the structure of the uplink reference signal and the structure of the downlink reference signal.

Specifically, in fig. 13, the uplink reference signal in the estimation interval (i.e., the dashed-line frame in the figure) is the uplink reference signal that is not interfered by the downlink data. It should be noted that the estimation interval is a manner used by the terminal when estimating the self-interference channel or the mutual interference channel, that is, the terminal may perform self-interference or mutual interference channel estimation on the uplink reference signal in the estimation interval, and perform interference suppression based on the determined channel result. For example, in the present embodiment, the structure of the uplink reference signal includes 2 consecutive uplink reference signals, and the structure of the downlink reference signal includes 1 downlink reference signal, then, as shown in fig. 13, the starting position of the estimation section is the same as the starting position of the structure of the downlink reference signal, and the length of the estimation section is equal to the sum of the symbol length (33.33us) occupied by one uplink reference signal and the symbol length (2.34us) occupied by the CP.

In summary, in the embodiment, k consecutive uplink reference signals are configured to increase the length of the structure of the uplink reference signal, so as to avoid the interference of downlink data on the uplink reference signal.

In another embodiment, still taking the value of a as 3 as an example, the base station may determine that k is 1 and q is 2, that is, the structure of the uplink reference signal includes 1 uplink reference signal, and the structure of the downlink reference signal includes 2 consecutive downlink reference signals. That is, the base station may configure a plurality of consecutive downlink reference signals in the structure of the downlink reference signals to increase the length of the structure of the downlink reference signals, so as to implement that there is at least one uplink reference signal that is orthogonal to the downlink reference signals and does not overlap with the downlink data, and the structure of the reference signals is as shown in fig. 14. It should be noted that, as described above, due to the asynchrony between the uplink reference signal and the downlink reference signal generated by the distance between the terminal and the base station or other terminals, and the asynchrony is shown in fig. 10, that is, the time delay difference between the uplink reference signal and the downlink reference signal is Δ t, in order to achieve that at least one uplink reference signal that is not interfered by the downlink data exists in the structure of the configured uplink reference signal, in this embodiment (that is, the structure of the uplink reference signal includes 1 uplink reference signal, and the structure of the downlink reference signal includes a plurality of continuous downlink reference signals), the position of the repeated downlink reference signal is configured in front of the original downlink reference signal (that is, the downlink reference signal on the time slot n), that is, in the downlink signal on the time slot n-1. Specifically, in fig. 14, the uplink reference signal in the estimation interval (i.e., the dashed-line frame in the figure) is the uplink reference signal that is not interfered by the downlink data. In this embodiment, the structure of the uplink reference signal includes 1 uplink reference signal, and the structure of the downlink reference signal includes 2 consecutive downlink reference signals, then, as shown in fig. 14, the starting position of the estimation section is the same as the starting position of the structure of the uplink reference signal, and the length of the estimation section is equal to the sum of the symbol lengths (2.34us) occupied by one uplink reference signal (33.33us) and CP.

In summary, in this embodiment, q consecutive downlink reference signals are configured to increase the length of the structure of the downlink reference signal, so as to avoid interference of downlink data on the uplink reference signal.

In another embodiment, taking a value of a as 5 as an example, the base station may determine that k is 2 and q is 3, that is, the structure of the uplink reference signal includes 2 consecutive uplink reference signals, and the structure of the downlink reference signal includes 3 consecutive downlink reference signals. That is, the base station may increase the length of the structure of the uplink reference signal by configuring a plurality of consecutive uplink reference signals in the structure of the uplink reference signal, and increase the length of the structure of the downlink reference signal by configuring a plurality of consecutive downlink reference signals in the structure of the downlink reference signal, thereby implementing that there is at least one uplink reference signal (2 uplink reference signals exist in the estimation section as shown in fig. 15) that is orthogonal to the downlink reference signal and does not overlap with the downlink data, and the structure of the reference signal is as shown in fig. 15. It should be noted that, as described above, due to the asynchrony between the uplink reference signal and the downlink reference signal generated by the distance between the terminal and the base station or other terminals, and the asynchrony is shown in fig. 10, that is, the time delay difference between the uplink reference signal and the downlink reference signal is Δ t, in order to achieve that at least one uplink reference signal that is not interfered by the downlink data exists in the structure of the configured uplink reference signal, in this embodiment (that is, the structure of the uplink reference signal includes a plurality of continuous uplink reference signals, and the structure of the downlink reference signal includes a plurality of continuous downlink reference signals), the position of the repeated uplink reference signal may be configured before the original downlink reference signal (that is, the downlink reference signal on the time slot n) after the repeated uplink reference signal is configured with the original uplink reference signal (that is, the uplink reference signal on the time slot n), i.e., the downlink signal on time slot n-1. Specifically, in fig. 15, the uplink reference signal in the estimation interval (i.e., the dashed-line frame in the figure) is the uplink reference signal that is not interfered by the downlink data. In this embodiment, the structure of the uplink reference signal includes 2 consecutive uplink reference signals, and the structure of the downlink reference signal includes 3 consecutive downlink reference signals, then, as shown in fig. 15, the starting position of the estimation section is the same as the starting position of the structure of the uplink reference signal, and the length of the estimation section is equal to the sum of the symbol length (33.33us) occupied by one uplink reference signal and the symbol length (2.34us) occupied by the symbol length CP occupied by the CP. Alternatively, as shown in fig. 16, another configuration when k is 2 and q is 3, in fig. 16, the repeated uplink reference signal is configured after the original uplink reference signal, and the repeated downlink reference signals are respectively located before and after the original downlink reference signal, obviously, as shown in fig. 16, 2 uplink reference signals that do not overlap with the downlink data exist in the estimation section, and when the terminal side estimates the interference channel, the accuracy of the interference channel estimation can be effectively improved. Therefore, when the structure of the uplink reference signal and/or the structure of the downlink reference signal include multiple continuous reference signals, the positions of the continuous reference signals may be set based on the delay difference Δ t between the uplink reference signal and the downlink reference signal, that is, on the premise that at least one uplink reference signal that does not overlap with the downlink data exists, the number of uplink reference signals that do not overlap with the downlink data may be increased by adjusting the positions of the continuously repeated uplink reference signals or downlink reference signals, thereby improving the accuracy of channel estimation.

In summary, in the embodiment, the length of the uplink reference signal can be increased by configuring k consecutive uplink reference signals, and the length of the structure of the downlink reference signal can be increased by configuring q consecutive downlink reference signals, so as to avoid the interference of the downlink data to the uplink reference signal.

It should be noted that, in this embodiment, the calculation results of k and q may be determined in the cell initialization process, that is, after determining the value range of a, the base station may determine the value of a in the satisfied interval, and randomly select the values of k and q based on the determined value of a. Alternatively, the base station may also be based on the load condition of the current resource, for example: if the downlink resource scheduling load is too large, the k value can be adaptively adjusted to be high, and the q value can be adjusted to be low, so that the dynamic adjustment of the structure of the uplink/downlink reference signal is realized.

Optionally, in this embodiment, the preset rule may be set at the base station side, that is, after the base station determines the structure of the uplink reference signal and the structure of the downlink reference signal based on the cell radius corresponding to the cell accessed by the terminal, step 203 is performed, that is, the base station notifies the terminal of the structure of the uplink reference signal configured for the terminal. Optionally, the preset rule may also be set at the base station side and the terminal side, that is, the base station side may determine the structure of the corresponding uplink reference signal and the structure of the corresponding downlink reference signal based on the cell radius, and the terminal side may also obtain the cell radius of the base station in the access process and determine the structure of the corresponding uplink reference signal and the structure of the corresponding downlink reference signal.

It should be noted that, in the present application, the structure of the uplink reference signal only includes 1 CP and 1 GP (where, GP may not exist), and the structure of the downlink reference signal only includes 1 CP and 1 GP.

Step 203, the base station sends the configuration information to the terminal.

For details, reference may be made to step 103, which is not described herein.

And step 204, the terminal configures the uplink reference signal based on the configuration information.

For details, reference may be made to step 104, which is not described herein.

Scene three

Referring to fig. 1, as shown in fig. 17, a schematic flow chart of a method for configuring a full duplex reference signal in the embodiment of the present application is shown, where in fig. 17:

step 301, the terminal accesses the base station.

Step 302, the base station determines the structure of the uplink reference signal and the structure of the downlink reference signal according to the configuration parameters of the base station.

Specifically, in the embodiment of the present application, the preset rule may include: and the base station determines the number of blank symbols contained in the structure of the uplink reference signal and/or the number of blank symbols contained in the structure of the downlink reference signal based on the configuration parameters of the base station. Optionally, if two or more blank symbols exist in the structure of the uplink reference signal, the plurality of blank symbols are consecutive in the structure of the uplink reference signal, and similarly, if two or more blank symbols exist in the structure of the downlink reference signal, the plurality of blank symbols are consecutive in the structure of the downlink reference signal.

Specifically, in the embodiment of the present application, when a blank symbol is used in the structure of the uplink reference signal and the structure of the downlink reference signal, unlike the orthogonality between the uplink reference signal and the downlink reference signal in the scenario two, it is further specified in the preset rule that at least one uplink reference signal does not overlap with the downlink data and does not overlap with the downlink reference signal in the structure of the uplink reference signal, that is, only the uplink reference signal that overlaps with the blank symbol exists. It should be noted that, in some embodiments, since adding the blank symbol will cause a position of the reference signal (uplink reference signal and/or downlink reference signal) on the time domain resource to change, the rule of the preset rule also needs to consider that the downlink reference signal on the base station side does not overlap with the uplink data and does not overlap with the uplink reference signal, that is, the downlink reference signal only overlaps with the blank symbol. For example, the following steps are carried out: if the structure of the uplink reference signal and the structure of the downlink reference signal at the terminal side are shown in fig. 18a, the structure of the uplink reference signal and the structure of the downlink reference signal at the base station side are shown in fig. 18b, and it is obvious that although the structure of the uplink reference signal at the terminal side includes 1 uplink reference signal without interference, the downlink reference signal at the base station side overlaps with the uplink data, and further affects the estimation of the self-interference channel (i.e., the interference caused by the downlink signal transmitted by the base station) by the base station. Therefore, as described above, in the embodiment of the present application, the base station determines the number of the added blank symbols and also needs to determine the positions of the added blank symbols according to the configuration information, so as to ensure that at least one uplink reference signal not affected by interference exists on the terminal side and at least one downlink reference signal not affected by interference exists on the base station side.

The following illustrates different configurations of the blank symbols:

alternatively, the base station may calculate the number n of downlink reference signals in the structure of downlink reference signals according to the following formula:

n≥2*r/(c*(T_cp+T_data)) (2)

where r denotes the cell radius of the base station, T_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataDenotes the length of the symbol occupied by the uplink reference signal or the downlink reference signal, and c denotes the speed of light (3 x 10)⁸m/s), and n is an integer greater than 1, and the number m of blank symbols in the structure of the uplink reference signal is an integer greater than or equal to 1.

Optionally, in this application, m consecutive blank symbols may be configured in the structure of the uplink reference signal, and the m consecutive blank symbols are located after the uplink reference signal, where m is an integer greater than or equal to 1, and the setting of the m consecutive blank symbols is used to ensure that the downlink reference signal on the base station side is not interfered. Correspondingly, n continuous blank symbols may be configured in the structure of the downlink reference signal, and the value of n may be determined according to formula (2), for example, the value of n may be a minimum value in a value range, or the value of n may be any value in the value range, and the value of n may be according to actual requirements, for example: the resource utilization rate and other factors are determined, and the application is not limited. As shown in fig. 19, there are 1 blank symbol in the structure of the uplink reference signal, and there are 3 consecutive blank symbols in the structure of the downlink reference signal, where the 3 consecutive blank symbols are located before the downlink reference signal, and where 1 blank symbol is located in the slot n, and the other 2 blank symbols are located in the slot n-1. In fig. 20, for the base station side, as described above, the uplink reference signal corresponding to the timeslot n is synchronized with the downlink reference signal, that is, timing alignment is performed. Therefore, the blank symbol on the timeslot n is used to adjust the position of the downlink reference signal to align with (or may be understood as overlapping with) the blank symbol in the structure of the uplink reference signal, so as to avoid the interference effect of the uplink data or the partial uplink reference (it should be noted that, if the partial uplink reference signal and the partial blank symbol are both overlapped with the downlink reference signal, the estimation result of the interference channel is also affected) on the downlink reference signal.

Alternatively, in the present application, the blank symbols may also be added as shown in fig. 21, that is, in fig. 21, the blank symbols in the structure of the uplink reference signal are located before the uplink reference signal, and the blank symbols in the structure of the downlink reference signal are located after the downlink reference signal.

It should be noted that the arrangement manner of the blank symbols (including the positions and the number of the blank symbols in the structure of the reference signal) described in the embodiment of the present application is an illustrative example, for example, the blank symbols may be arranged before and after the uplink reference signal to adjust the position of the uplink reference signal in the structure of the uplink reference signal and the length of the structure of the uplink reference signal, and based on the adjustment of the structure of the uplink reference signal, corresponding blank symbols may be correspondingly added in the structure of the downlink reference signal to adjust the length of the structure of the downlink reference signal and the position of the downlink reference signal in the structure of the downlink reference signal. That is, on the premise of ensuring that the uplink reference signal at the terminal side is not orthogonal to the downlink data or part of the downlink reference signal (that is, the entire uplink reference signal (including 33.33us) may also be completely orthogonal to the downlink reference signal by adding a blank symbol), the setting is performed according to actual requirements (for example, the size of the delay difference, or the resource utilization, and other factors).

In addition, in a possible implementation manner, the manner of configuring the reference signal in scenario two, that is, the manner of configuring the repeated reference signal to adjust the length of the structure of the reference signal, may be used in combination with the manner of configuring the reference signal in scenario three, that is, the manner of configuring the blank symbol to adjust the length of the structure of the reference signal. As shown in fig. 22a, the structure of the uplink reference signal includes a plurality of consecutive uplink reference signals, and correspondingly, the structure of the downlink reference signal includes a downlink reference signal and at least one blank symbol (where the blank symbol may be consecutive or may not be consecutive). As shown in fig. 22b, as another possible implementation manner, in fig. 22b, the structure of the uplink reference signal includes at least one blank symbol (where the blank symbol may be continuous or discontinuous), and the structure of the downlink reference signal includes a plurality of continuous downlink reference signals. It should be noted that the reference signal structures shown in fig. 22a and fig. 22b are also schematic examples, that is, in the embodiment of the present application, a method of combining blank symbols with repeated reference signals may be a method of using repeated uplink reference signals and/or blank symbols in a structure of an uplink reference signal, and using blank symbols and/or repeated downlink reference signals for a corresponding downlink reference signal, where the configuration principle is to ensure that the uplink reference signal on the terminal side is not affected by interference (does not overlap with downlink data) and the downlink reference signal on the base station side is not affected by interference (does not overlap with uplink data).

Step 303, the base station sends configuration information to the terminal.

For details, reference may be made to step 103, which is not described herein.

And step 304, the terminal configures the uplink reference signal based on the configuration information.

For details, reference may be made to step 104, which is not described herein.

Scene four

Referring to fig. 1, as shown in fig. 23, a schematic flow chart of a method for configuring a full duplex reference signal in the embodiment of the present application is shown, where in fig. 23:

step 401, the terminal accesses the base station.

Step 402, the base station determines the structure of the uplink reference signal and the structure of the downlink reference signal according to the distance parameter between the terminal and the base station.

Specifically, in the embodiment of the present application, the preset rule may include: the base station determines the number of uplink reference signals in the structure of the uplink reference signals and the number of downlink reference signals in the structure of the downlink reference signals based on the distance parameter between the terminal and the base station, wherein if two or more uplink reference signals exist in the structure of the uplink reference signals, a plurality of uplink reference signals are continuous in the structure of the uplink reference signals, and similarly, if two or more downlink reference signals exist in the structure of the downlink reference signals, a plurality of downlink reference signals are continuous in the structure of the downlink reference signals.

Optionally, in the communication manner shown in fig. 5, both the base station and the terminal operate in a full duplex mode, and both the terminal and the base station are affected by self-interference. In this communication scheme, the base station may calculate the number k of uplink reference signals in the structure of uplink reference signals and the number q of downlink reference signals in the structure of downlink reference signals based on the following formulas:

d≤T_cp+(A-2)*T_datac/2, wherein k + q ═ A (3)

Wherein d represents the distance between the base station and the terminal in fig. 5, T_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataDenotes the length of the symbol occupied by the uplink reference signal or the downlink reference signal, and c denotes the speed of light (3 x 10)⁸m/s), and k and q are each an integer greater than or equal to 1.

The method for determining k and q by the base station according to the formula may refer to scenario two, which is not described herein.

Alternatively, in the communication method shown in fig. 4, the base station operates in a full-duplex mode, and the terminal operates in a half-duplex mode, or the terminal may be a full-duplex terminal, and when communicating with the base station, the communication method shown in fig. 4 is adopted. In this communication scheme, the base station may calculate the number k of uplink reference signals in the structure of uplink reference signals and the number q of downlink reference signals in the structure of downlink reference signals based on the following formulas:

D≤T_cp+(A-2)*T_datac/2, wherein k + q ═ A (4)

Wherein D ═ D₁+d₂-d₃，d₁Is the distance between the base station and the terminal 1, d₂Is the distance between the base station and terminal 2, d₃Distance, T, between terminal 1 and terminal 2_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataIndicating uplink reference signal or downlink reference signalOccupied symbol length, c denotes the speed of light (3 x 10)⁸m/s), and k and q are each an integer greater than or equal to 1.

In step 403, the base station sends configuration information to the terminal.

In step 404, the terminal configures the uplink reference signal based on the configuration information.

In summary, in the present application, the base station may adjust the length of the structure of the reference signal by adjusting the number of repetitions of the reference signal in the structure of the reference signal according to the delay difference corresponding to the terminal (for example, the delay difference between the corresponding uplink signal and downlink signal is larger for the terminal farther away from the base station), so that the resource utilization rate is effectively improved on the premise of improving the interference channel estimation.

Scene five

Referring to fig. 1, as shown in fig. 24, a schematic flow chart of a method for configuring a full duplex reference signal in the embodiment of the present application is shown, where in fig. 24:

step 501, the terminal accesses the base station.

Step 502, the base station determines the structure of the uplink reference signal and the structure of the downlink reference signal according to the distance parameter between the terminal and the base station.

Specifically, in the embodiment of the present application, the preset rule may include: and the base station determines the number of blank symbols contained in the structure of the uplink reference signal and/or the number of blank symbols contained in the structure of the downlink reference signal based on the distance parameter between the terminal and the base station. Optionally, if two or more blank symbols exist in the structure of the uplink reference signal, the plurality of blank symbols are consecutive in the structure of the uplink reference signal, and similarly, if two or more blank symbols exist in the structure of the downlink reference signal, the plurality of blank symbols are consecutive in the structure of the downlink reference signal.

n≥2*d/(c*(T_cp+T_data)) (5)

n≥2*D/(c*(T_cp+T_data)) (5)

wherein D ═ D₁+d₂-d₃，d₁Is the distance between the base station and the terminal 1, d₂Is the distance between the base station and terminal 2, d₃Distance, T, between terminal 1 and terminal 2_cpIndicating the symbol length occupied by the cyclic prefix in the structure of the uplink reference signal and/or the structure of the downlink reference signal, T_dataDenotes the length of the symbol occupied by the uplink reference signal or the downlink reference signal, c denotes the speed of light (3 × 108m/s), and k and q are both integers greater than or equal to 1.

In step 503, the base station sends configuration information to the terminal.

In step 504, the terminal configures the uplink reference signal based on the configuration information.

In summary, in the present application, the base station may adjust the length of the structure of the reference signal and the position of the reference signal in the structure of the reference signal by adjusting the number and the position of the blank symbols in the structure of the reference signal according to the delay difference corresponding to the terminal (for example, the farther the terminal is from the base station, the larger the delay difference between the corresponding uplink signal and downlink signal is), so as to effectively improve the resource utilization rate on the premise of improving the interference channel estimation.

Optionally, in the present application, the configuration manners in scene four and scene five may also be combined, and the specific details may refer to the corresponding descriptions in fig. 22a and fig. 22b in scene three, which are not described herein again.

The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that the base station or the terminal includes corresponding hardware structures and/or software modules for performing the respective functions in order to implement the above-described functions. Those of skill in the art will readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

In the embodiment of the present application, the base station or the terminal may be divided into the functional modules according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.

In the case of dividing each functional module by corresponding functions, fig. 25 shows a possible structural schematic diagram of the terminal 300 according to the above embodiment, as shown in fig. 25, the terminal 300 may include: a receiving module 301 and a configuration module 302. The receiving module 301 may be configured to "receive configuration information", for example, the module may be configured to support the terminal to perform the relevant steps of step 104, step 204, step 304, step 404, and step 504 in the above method embodiments. The configuration module 302 may be configured to "configure the uplink reference signal based on the received configuration information" step, for example, the module may be configured to support the terminal to perform the relevant steps of step 104, step 204, step 304, step 404, and step 504 in the above-described method embodiments.

Fig. 26 shows a schematic structural diagram of a base station 400 involved in the foregoing embodiment, and as shown in fig. 26, the base station may include: a determination module 401, a configuration module 402, and a sending module 403. The determining module 401 may be configured to perform the step of "determining the structure of the uplink reference signal of the terminal based on a preset rule", for example, the module may be configured to support the base station to perform the relevant step of step 102 in the foregoing method embodiment. The configuration module 402 may be configured to perform a step of "configuring a structure of a downlink reference signal based on a preset rule", for example, the module may be configured to support a base station to perform related steps of step 102, step 202, step 302, step 402, and step 502 in the above method embodiments. The sending module 403 may be configured to "send configuration information to the terminal", for example, the module may be configured to support the base station to perform the relevant steps of step 103, step 203, step 303, step 403, and step 503 in the foregoing method embodiments.

An apparatus provided by an embodiment of the present application is described below. As shown in fig. 27:

the apparatus comprises a processing module 501 and a communication module 502. Optionally, the apparatus further comprises a storage module 503. The processing module 501, the communication module 502 and the storage module 503 are connected by a communication bus.

The communication module 502 may be a device with transceiving function for communicating with other network devices or a communication network.

The storage module 503 may include one or more memories, which may be devices in one or more devices or circuits for storing programs or data.

The memory module 503 may be independent and connected to the processing module 501 through a communication bus. The memory module may also be integrated with the processing module 501.

The apparatus 500 may be used in a network device, circuit, hardware component, or chip.

The apparatus 500 may be a terminal in the embodiment of the present application, such as the terminal 1 or the terminal 2. A schematic diagram of the terminal may be as shown in fig. 2 b. Optionally, the communication module 502 of the apparatus 500 may include an antenna and a transceiver of a terminal, such as the antenna 104 and the transceiver 102 in fig. 2 b. Optionally, the communication module 502 may also include output devices and input devices, such as output device 1214 and input device 1215 in fig. 2 b.

The apparatus 500 may be a chip in a terminal in an embodiment of the present application. The communication module 502 may be an input or output interface, a pin or processing circuit, or the like. Alternatively, the storage module may store computer-executable instructions of the terminal-side method, so that the processing module 501 executes the terminal-side method in the above-described embodiments. The storage module 503 may be a register, a cache, or a RAM, etc., and the storage module 503 may be integrated with the processing module 501; the memory module 503 may be a ROM or other type of static storage device that may store static information and instructions, and the memory module 503 may be separate from the processing module 501. Alternatively, as wireless communication technology evolves, a transceiver may be integrated on the apparatus 500, e.g., the communication module 502 integrates the transceiver 202.

When the apparatus 500 is a terminal or a chip in a terminal in the embodiment of the present application, the apparatus 500 may implement the method performed by the terminal in the embodiment described above. The apparatus 500 may be a base station in an embodiment of the present application. A schematic diagram of a base station may be as shown in fig. 2 a. Optionally, the communication module 502 of the apparatus 500 may comprise an antenna and a transceiver of a base station, such as the antenna 105 and the transceiver 103 in fig. 2 a. The communication module 502 may also include a network interface of a base station, such as the network interface 104 in fig. 2 a.

The apparatus 500 may be a chip in a base station in the embodiment of the present application. The communication module 502 may be an input or output interface, a pin or processing circuit, or the like. Alternatively, the storage module may store computer-executable instructions of the method at the base station side, so that the processing module 501 executes the method at the base station side in the above embodiment. The storage module 503 may be a register, a cache, or a RAM, etc., and the storage module 503 may be integrated with the processing module 501; the memory module 503 may be a ROM or other type of static storage device that may store static information and instructions, and the memory module 503 may be separate from the processing module 501. Alternatively, as wireless communication technology advances, a transceiver may be integrated on the apparatus 500, for example, the communication module 502 integrates the transceiver 103 and the network interface 104.

When the apparatus 500 is a base station or a chip in the base station in the embodiment of the present application, the method performed by the base station in the embodiment described above may be implemented. The embodiment of the application also provides a computer readable storage medium. The methods described in the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media may include computer storage media and communication media, and may include any medium that can communicate a computer program from one place to another. A storage media may be any available media that can be accessed by a computer.

As an alternative design, a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

The embodiment of the application also provides a computer program product. The methods described in the above embodiments may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. If implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in the above method embodiments are generated in whole or in part when the above computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a computer network, a network appliance, a user device, or other programmable apparatus.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A method for configuring full-duplex reference signals is applied to a terminal, and the method comprises the following steps:

receiving configuration information;

configuring an uplink reference signal based on the configuration information;

the configuration information is sent to the terminal after the base station determines the structure of an uplink reference signal and the structure of a downlink reference signal of the terminal based on a preset rule;

and the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with the downlink data transmitted by the base station.

2. The method of claim 1, wherein the preset rules comprise:

the structure of the uplink reference signals comprises k uplink reference signals, wherein k is an integer greater than 1;

and/or the presence of a gas in the gas,

the structure of the downlink reference signals comprises q downlink reference signals, wherein q is an integer greater than 1.

3. The method of claim 2, wherein the preset rules comprise:

determining the k value according to the configuration parameters of the base station;

the configuration parameter is used for indicating the cell radius of the base station.

4. The method of claim 2, wherein the preset rules comprise:

and determining the k value according to the distance parameter between the terminal and the base station.

5. The method of claim 2, wherein the preset rules comprise:

determining the q value according to the configuration parameters of the base station;

6. The method of claim 2, wherein the preset rules comprise:

and determining the q value according to the distance parameter between the terminal and the base station.

7. The method according to any one of claims 2 to 6, wherein,

the k uplink reference signals are continuous in the structure of the uplink signals; and the number of the first and second groups,

the q downlink reference signals are consecutive in the structure of the downlink signals.

8. The method according to any one of claims 2 to 7, wherein,

the at least one uplink reference signal is orthogonal to a downlink reference signal in the structure of the downlink reference signal.

9. The method of claim 2, wherein the k value and the q value satisfy the following equation:

r≤T_cp+(A-2)*T_datac/2, wherein k + q ═ a;

wherein r represents a distance between the terminal and the base station or a cell radius of the base station, T_cpIndicating the structure of the uplink reference signal and/or the symbol length occupied by the cyclic prefix in the structure of the downlink reference signal, T_dataAnd c represents the symbol length occupied by the uplink reference signal or the downlink reference signal, and the speed of light.

10. The method according to any one of claims 1 to 9, wherein the preset rules include:

the structure of the uplink signal comprises the uplink reference signal and m blank symbols, and the structure of the downlink signal comprises the downlink reference signal and n blank symbols;

wherein m is an integer greater than or equal to 1, and n is an integer greater than m.

11. The method of claim 10, wherein the preset rules comprise:

determining the m value and the n value according to the configuration parameters of the base station;

12. The method of claim 10, wherein the preset rules comprise:

and determining the m value and the n value according to the distance parameter between the terminal and the base station.

13. The method according to any one of claims 10 to 12,

the m blank symbols are consecutive in the structure of the uplink reference signal; and the number of the first and second groups,

the n blank symbols are consecutive in the structure of the downlink reference signal.

14. The method according to any one of claims 10 to 13, wherein the n value satisfies the following condition:

n≥2*r/(c*(T_cp+T_data))

15. A method for configuring full duplex reference signals, which is applied to a base station, the method comprising:

determining the structure of an uplink reference signal of the terminal based on a preset rule; and the number of the first and second groups,

configuring a structure of a downlink reference signal based on the preset rule;

sending configuration information to the terminal, wherein the configuration information is used for indicating the terminal to configure an uplink reference signal based on the structure of the uplink reference signal;

the structure of the uplink reference signal comprises at least one uplink reference signal which is not overlapped with downlink data transmitted by the base station.

16. The method of claim 15, wherein the preset rules comprise:

and/or the presence of a gas in the gas,

17. The method of claim 16, wherein the preset rules comprise:

18. The method of claim 16, wherein the preset rules comprise:

19. The method of claim 16, wherein the preset rules comprise:

20. The method of claim 16, wherein the preset rules comprise:

21. The method of any one of claims 16 to 20, wherein,

22. The method of any one of claims 16 to 21, wherein,

23. The method of claim 16, wherein the k value and the q value satisfy the following condition:

r≤T_cp+(A-2)*T_datac/2, wherein k + q ═ a;

24. The method according to any one of claims 15 to 23, wherein the preset rules comprise:

25. The method of claim 24, wherein the preset rules comprise:

26. The method of claim 24, wherein the preset rules comprise:

27. The method of any one of claims 24 to 26,

28. The method according to any one of claims 24 to 27, wherein the n value satisfies the following condition:

n≥2*r/(c*(T_cp+T_data))

29. A terminal, comprising:

a memory to store instructions;

one or more processors coupled with the memory, the processors to execute the instructions; wherein the instructions are for controlling the terminal to perform the method of any one of claims 1 to 14.

30. A base station, comprising:

a memory to store instructions;

one or more processors coupled with the memory, the processors to execute the instructions; wherein the instructions are for controlling the terminal to perform the method of any of claims 15 to 28.

31. A computer readable storage medium having stored thereon a computer program comprising at least one code section executable by a terminal for controlling the terminal to perform the method of any of claims 1-14.

32. A computer readable storage medium having stored thereon a computer program comprising at least one code section executable by a base station for controlling the base station to perform the method of any of claims 15-28.

33. A computer program for performing the method of any one of claims 1-14 when the computer program is executed by a terminal.

34. A computer program for performing the method of any one of claims 15-28 when the computer program is executed by a base station.

35. A chip, the chip includes processing circuitry, transceiver pins; wherein the transceiver pins and the processing circuitry are in communication with each other via an internal connection path, the processing circuitry being configured to perform the method of any of claims 1-14.

36. A chip, the chip includes processing circuitry, transceiver pins; wherein the transceiver pins and the processing circuitry are in communication with each other via an internal connection path, the processing circuitry being configured to perform the method of any of claims 15-28.

37. A system, comprising:

a terminal for performing the method of any one of claims 1-14;

a base station for performing the method of any one of claims 15-28.